SwissMicros DM41X, User Manual

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If the message "No DFU capable devices found" still remains there something is wrong with libusb
driver installation or connection to the calculator or the calculator isn’t in bootloader mode.
Finally press the
[Program]
button to flash new firmware.
7.4. FW Update Using dfu-util

macOS users can get dfu-util via Homebrew

Linux users (and possibly macOS users too) can avoid
sudo
use by setting
appropriate user rights for DFU interface, see user rights configuration for Linux .
Note that
dfu-util
is command line utility and you have to be able to launch terminal application
and launch commands from console. If you are new to this, here are some tutorials:
• macOS: https://blog.teamtreehouse.com/introduction-to-the-mac-os-x-command-line
• Linux: https://www.digitalocean.com/community/tutorials/an-introduction-to-the-linux-terminal
• Windows: https://www.bleepingcomputer.com/tutorials/windows-command-prompt-
introduction/
Now you can proceed with the following steps:
Switch the calculator to bootloader mode
From menu or by RESET+PGM buttons (see Bootloader mode activation ).
Connect the calculator to the PC
You can list information about connected DFU device using console command
sudo dfu-util -l
Sample output of this command (from macOS)
21